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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

City of Newton

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.41 ppb1615ND - 3.10 ppb
20151.18 ppb1611ND - 3.10 ppb
20161.40 ppb1612ND - 4.00 ppb
20171.60 ppb1612ND - 4.40 ppb
20181.29 ppb1611ND - 4.90 ppb
20191.44 ppb1612ND - 3.50 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-10601320.700 ppb
2014-02-10600501.40 ppb
2014-02-10600421.30 ppb
2014-02-10600351.30 ppb
2014-05-05109976ND
2014-05-051099751.50 ppb
2014-05-051099740.510 ppb
2014-05-051099731.50 ppb
2014-08-181759993.10 ppb
2014-08-181759980.610 ppb
2014-08-181760001.20 ppb
2014-08-181760012.50 ppb
2014-11-172330823.00 ppb
2014-11-172330812.30 ppb
2014-11-172330800.520 ppb
2014-11-172330791.10 ppb
2015-02-23284218ND
2015-02-23284217ND
2015-02-232842160.940 ppb
2015-02-232842151.50 ppb
2015-05-183349950.600 ppb
2015-05-18334996ND
2015-05-183349981.50 ppb
2015-05-183349972.00 ppb
2015-08-18390599ND
2015-08-183905971.60 ppb
2015-08-183905952.60 ppb
2015-08-183905891.90 ppb
2015-11-174281652.00 ppb
2015-11-17428164ND
2015-11-174281631.10 ppb
2015-11-174281623.10 ppb
2016-02-224971141.10 ppb
2016-02-224971131.60 ppb
2016-02-224971150.690 ppb
2016-02-22497116ND
2016-05-235514041.50 ppb
2016-05-23551403ND
2016-05-235514024.00 ppb
2016-05-235514011.20 ppb
2016-08-22607948ND
2016-08-226079472.60 ppb
2016-08-226079462.30 ppb
2016-08-226079451.40 ppb
2016-11-07656978ND
2016-11-076569811.80 ppb
2016-11-076569801.30 ppb
2016-11-076569792.90 ppb
2017-02-137082321.10 ppb
2017-02-13708231ND
2017-02-137082301.50 ppb
2017-02-137082291.90 ppb
2017-05-237661643.70 ppb
2017-05-237661631.10 ppb
2017-05-23766162ND
2017-05-237661612.10 ppb
2017-08-298297784.40 ppb
2017-08-29829777ND
2017-08-298297801.50 ppb
2017-08-298297812.30 ppb
2017-11-148789683.10 ppb
2017-11-148789672.20 ppb
2017-11-148789660.640 ppb
2017-11-14878965ND
2018-02-12908555ND
2018-02-12908554ND
2018-02-129085531.000 ppb
2018-02-209267741.30 ppb
2018-05-219741821.10 ppb
2018-05-219741830.680 ppb
2018-05-21974185ND
2018-05-219741841.70 ppb
2018-08-1310251613.90 ppb
2018-08-131025160ND
2018-08-1310251591.20 ppb
2018-08-1310251584.90 ppb
2018-11-1310773781.80 ppb
2018-11-1310773770.780 ppb
2018-11-131077376ND
2018-11-1310773752.20 ppb
2019-02-0411145111.40 ppb
2019-02-0411145101.30 ppb
2019-02-0411145120.650 ppb
2019-02-041114513ND
2019-05-201157986ND
2019-05-2011579852.40 ppb
2019-05-2011579841.000 ppb
2019-05-2011579832.20 ppb
2019-08-1312232383.00 ppb
2019-08-1312232371.70 ppb
2019-08-1312232363.50 ppb
2019-08-131223235ND
2019-11-0412720522.20 ppb
2019-11-041272055ND
2019-11-0412720540.740 ppb
2019-11-0412720533.00 ppb